Taking over his position is current representative director Yosuke Matsuda who will now also serve as president.

source: Siliconera

Oh this is the best news in years!!! One of the best games released in years (Bioshock Infinite) and now this?! Good day indeed. Him being there was the beginning of the downfall. He joined right as FFX was finishing up, and all his projects since (mainly with FF) have been bleh. Wow. This really really really really excites me. Means maybe Square knows it needs to get it's act together.